Initially, Safe B12 injection dosage for adults is usually administered 1-3 times per week
Some people, however, struggle to maintain adequate levels of this vitamin due to various factors such as diet, absorption issues, or certain medical conditions
How often should I receive Vitamin B12 injections
Pharmacokinetics: Cyanocobalamin is administered intranasally, orally, and parenterally, while hydroxocobalamin is administered only parenterally. Once absorbed, vitamin B12 is highly bound to transcobalamin II, a specific B-globulin carrier protein and is distributed and stored primarily in the liver as coenzyme B12. The bone marrow also stores a significant amount of the absorbed vitamin B12. This vitamin crosses the placenta and is distributed into breast milk. Enterohepatic recirculation conserves systemic stores. The half-life is about 6 days (400 days in the liver). Elimination is primarily through the bile; however, excess cyanocobalamin is excreted unchanged in the urine
But if you're on a medication that interferes with vitamin B12 absorption, a B12 prescribed supplement or injections of the vitamin may be needed to maintain a healthy level
